Saddle for textile machines



Dec. 3, 1940. G. REPAss 2,224,105

SADDLE FOR TEXTILE MACHINES Filed April 13, 1940 2 Sheebs-Sheet 1 IN1/ENGR @fig/gg@ QQ/@w55 A TTURNEYS.

2 Sheets-Sheet 2 G. REPASS SADDLE FOR TEXTILE MACHINES Filed April 15, 1940 all' y .dlllllllllll'll'ilm Dec. 3, 1940.

INVENTGR AT'I'URNEYS.

Patented Dec. 3, 1940 r i y t UNITED STATES PATENT OFFICE l. l l :5,224,105 1 p g `SADDLE FOR TEXTILE MACHINES George Repass, Pawtucket, R. I., assignor to H & B American Machine Company, acorporation of Maine u a y Application April'i13, 1940, Serial No. 329,502 s claims. (c1. isi- 137) This invention relates to improvements in top tion, of the iulcrum member shown in Fig. 3 roll saddle mechanisms, and particularly to the taken substantially on the line4--4 of Fig. 3; connection between the back saddle and its sup- Fig.`5 is a modiiied form of fulcrum member porting member; and has for one of its objects embodying the present invention Afor use in con- `5 to provide a novel construction by which the nection withaback saddle; and 5' point of fulcrumingengagernent of the back sad- Fig. 6 is a vertical sectional View taken on the dle member with its supporting membercan be line 6--6 of Fig. 5. accurately positioned to provide the proper In the usual drawing mechanisms, constituted lengths of lever arms of the back saddle toeXert by three or more pairs of drawing rollers, various l0 the correct weight on the top rolls engaged by types of saddle or pressure mechanisms have been '10 the back saddle member required to be used in used hitherto to load by means -oi weights a pluthe different adjusted positions of the top rolls rality of top rollsof the drawing mechanism in when drafting diierent lengths of textile fibers. which one prior form of top roll saddle mecha- Another object of the invention is to provide nism commonly used has consisted of two mema back saddle having a fulcrum member so arbers, viz., a back or under saddle which rests on 15 ranged that two separate fulcrum points will be the last top roll vand also on the next to the last alternately available `to connect the back saddle top roll, and an upper or front saddle that rests with its supporting member -at the correct posiat one end of a forwardly disposed top roll and tion relative to the same when the back saddle hasa straight shank extension directed rearwardis hung thereon, which fulcrum points will be kly which rests on and supports the under saddle 20 alternately brought into fulcruming engagement member, in which a stirrup hung from the front by reversal oi .the back saddle on its supporting saddle and sustaining the usual weighted lever member. transmitsthe -action of theweight to the saddle Another object of the invention is to `provide mechanism to apply pressure in proper proporaback saddle member of the above character in tion to all the top rollers.` I

which each of the two fulcrum points Will have In the previous type oi top roll saddle mechsubstantially a knife'edge connectiony with the anism above described, the back `saddle is so under side `of thev saddle-supporting member supported on the straight rearward extension ci"V when the back saddle is positioned in fulcruming the front saddle that the Weight is applied to engagement with its support. 1 the back saddle over a broad area of contact. 30

With these and other objects in View, the in- Consequently, the load or pressure distribution `vention consists of certain novel features of conis indeterminate and not capable of control t0 struction, as will be more fully described, and the limits of precision necessary for obtaining particularly pointed out in the appended claims. proper weighting of the rolls upon which only In the accompanying drawings: the back'saddle rests since any adjustment oi 35 Fig. 1 lis a transverse sectional viewof a part the point 0f applicati@ 0f PIGSSU-I by the Stil'- of a textile drafting apparatus employing `iive rup on the front saddle made for the purpose of pairs of drawing rolls, showing a top roll saddle increasing or diminishing the veffective pull of mechanism havingy a back saddle constructed the weight will affect the weight distribution on in accordance with the present invention and in al1 the Itop rolls while any pressure applied to the v4.0

an operating position; f back lsaddle is on a `bearing portion having a Fig. 2 is a side elevational view of a `portion of relatively broad area of contact `with the straight the top roll saddle mechanism illustrated in Fig. rearwardly extending shank extension of the l and showing the back saddle in a reversed pofront saddle so that there can be secured no yi5 sition resting on the back top rolls` whereby the slight adjustment of the fulcrum point of the 45 relative lengths of the lever arms of the rback back saddle when the same is reversed in its saddle have been changed over those represented position4 0n its 4SillllOrtrltf member; and in order in Fig. 1 for` eiecting the proper pressure distoifsecure these desirable results I have protribution on the back top rolls whentheir setvided aback saddle having two selectable -fultings have been increased to operate on textile crum points 0f line COHSC Which are alternately '50 fibers of greater length; a usable for fulcrumingengagement with the under Fig. 3 is an enlarged sectional view showing side of its support member, and these fulcrum details of construction of the fulcrum member points consist'of a pair of knife edges which form of the back saddle; theopposite edges of the top surface of a frustro- Fig. 4 is an end elevationalvew, par-tlyin secpyramid formation so that the weight is applied to the back saddle on a line when the supporting member for the rear saddle is inclined at a slight angle, such as for example, an angle of three degrees from the horizontal; and the distance 4between these knife edges on the rear is small, such as of the order of one-sixteenth of an inch 'is a more detailed description of the present embodiment of this invention, illustra-tingV the preferred means by which these advantageous resuits may be accomplished:`

With reference to the drawings wherein in Figs.

1 and 2 there is shown for illustrative purposes I one of the embodiments which the present in- Vention may take and applied to a iive roll drafting system, the arrangement shown therein comprises the front pair of top andbottom rolls I0 and Il, the rearspair of top and bottom rolls I2, I3 and intermediate pairs of top and bottom rolls I4, I5; I5, I'I and I8, I3 respectively, for acting successively on the moving strand of textile sliver or roving as indicated at 26 to attenuate the same in its progressive passage between the rolls.` The top rolls IEL; I2, I4, I6 and I8 are of the usual short construction, with or without an outer covering of cork or leather, resting upon their respective bottom rolls and Ysuitably journaled at their ends in the cap bar nebs 2l which are adjustable on the cap bar rod 22. The bottom rolls II, I3, E57, I1 and I9 are of considerable length and suitably journaled in the adjustable bearing blocks 23 on the roll stand 24 in the usual manner in such machines.

The top roll saddle mechanism herein shown comprises that disclosed and claimed in the copending application of Repass and Ahlberg, Serial No. 317,160, led February 3, `194,0, now Patent No. 2,203,419, granted June 4, 1940, in which an adjustable stirrup having fulcrumingconnection with the front saddle by means of a tooth in interengagement with a selected notch of a. toothed formation is positively locked by a detent in all adjusted positions inwhich separation of the toothed parts cannot be eilected without first rendering the detent member ineffective.` As illustrated, the top roll saddle mechanism comprises a front saddle l25 which rests on the second and third toprolls I4 and I5, a back saddle 26 which rests on the fourth and last top` rolls I8 yand I2 respectively, and a stirrup-carrier 21 having a rearwardly extending shank portion 21 and pivoted on the front saddle 25,V as at 28, the weighting pressure being derived from* any suitable means, such as a weight 30 the effect of which is transmitted to the stirrup-carrier 21 and applied thereby to the front saddle 25 and the back saddle 26 by means of the link 3l and the weightlever 32 which is pivotally .sustained on the roller beam 33 by` means of theslide 39 and the fulcrum eye 34, and transmitsfthe action of theweight tothe top roll saddle through the stirrup 35. The stirrup 35 `isf pivoted at its deilected lower end to the lever 3,2, as at 36, and the upper end is deflected and adjustably iulcrumed at its `top end on the stirrup-carrier 21 by means of `the tooth 31 having interengagement with a selected one of a series of notches of the toothed formation 38. The lever eye 34 is secured to a slide ,39 vsliiitable transversely of the rol-lerjbeamA and v having detachable connection therewith substanlrop-carrier 21 by means of an upright member V42 integral with the back saddle and formed with a spliteye-43, as shown in Figs. 3 to 6, through which extends the shank portion 21' of the stirrup-carrier 21 whereby the rear saddle 26 may be slid therealong into diierent selected and adjusted positions for varying the weight distribution on the last and the next to the last top rolls of the drawing mechanism when the back saddle 25 rests thereonand straddles one of these rolls, as depicted in Figs. l and 2, by means of prongs 44 and 45 which depend from one end portion of the saddle and embrace the neck of the top roll while the. trailing portion of the rear saddle has bearing contact Vwith the adjacent rear top roll on a at surface 46 formed on the under side of the saddle. Thus, when the roll settings of the pairs of rolls I 8, I9 and I2, I3 are varied in accordance with the length of cotton staple being drawn, the proper weight distribution on the top rolls I2 and I8 respectively is maintained to` compensate for the longer or shorter lengths of the cotton fiber by reversing the position of the rear saddle from that shown in Fig. 1 to the position shownin Fig. 2 in which the prongs 4t and 45 embrace( the neck of the next to the last top roll I8,-where in the rst instance they confine the neck of the last top roll I 2.

To provide proper weighting pressure on the top rolls I8-and I2 respectively after the roll settings or spacing between the pairs of rolls I8, I9 and I 2, I3 are located the correct distance apart for the particular staple of cotton being' drafted@ have provided in accordance with this invention, an improved dual iulcrum for the rear saddle in which the pointl of bearing contact which the back saddle 26 makes with the arm extension 21 when one or the other of the fulcrum edges 553 or 5I of the countersunk portions 52 and 53 at the opposite ends of the eye 43, as shown in Figs. v3 and 4 respectively, are in fulcruming engagement with the arm 21 when the latter is inclined at a slight angle from a horizontal position, such as, for example, three degrees with the plane containing its Aline of contact with the bottom cylindrical surface 55 of the eye 43." Thus, the edges 50and 5I may be alternately brought into a fulcruming position by reversal of the rear saddle on the arm extension 21, as indicated by the reversed positions of the rear saddle in-Figs. 1 and 2 respectively and Ahence it is only possible for the extension arm 21 to contact with one fulcrum edge ata time due to the inclined relation of the arm 21 with respect to the back saddle.

A modified structure is shown in Figs. 5 and 6 in which the back saddle 26 has the upright member 42 andthe split eye 43, as in Figs, 3 and 4,

lll

of the central opening of the eye and the free end of the plug is provided with a flat end face El and two inclined flat side faces 62 and 63 connecting with and located at opposite positions with respect to the face 6l l Thus, the respective meeting lines of the face 6I with the faces B2 or 63 will provide spaced knife edges for alternate fulcruming engagement with the inclined arm 21 for obtaining a predetermined and proper 10 amount of weighting action of the back saddle to the top rolls o-n which it bears.

The foregoing description is directed towards the specific embodiments disclosed herein, which are intended to be illustrative only and not re#- strictive as it will be obvious that various changes and modifications may be made in the form, construction and arrangement of parts other than those illustrated, without departing from the spirit and scope of the invention, such changes and modifications being restricted only by the scope of the appended claims.

I claim:

1. A back saddle for -top rolls of textile spinningmachines comprising a body member having a portion constructed to rest in a bearing relationship upon a top roll shaft, and a second portion so arranged as to extend across and rest upon the shaft of an adjacent top roll, and means intermediate the ends of said body upstanding from its top surface and so constructed and arranged as to receive and .be loosely mounted on the usual rearward arm extension of a front saddle member to hold the back saddle in a'suspended rela- 1 tionship on said arm extension and to permit A sliding movement of the back saddle therealong either into different longitudinally adjusted positions or to be wholly removed therefrom, said g means having associated therewith a pair of knife z .edges in spaced relation to each other and ar- 40', ranged for alternate engagement with the underside of said arm extension when the latter is in an inclined relation to the horizontal whereby only one of said knife edges at a time will be in fulcruming engagement with the undersurface of said arm extension in one position of the back saddle, the other of said knife edges being brought into fulcruming engagement with the undersurface of the said arm extension by reversal of the back saddle on the arm extension.

2. A back saddle comprising an elongated body member one portion of which carries a pair of depending prongs for straddlng opposite sides of a top roll shaft and to hold the remaining portion of the saddle with its underside in a bearing relationship across and resting upon an adjacent top roll shaft, said body member also having intermediate its ends an upright member integral with and extending upwardly from the upper face of the saddle close to substantially its mid-portion, said upright member being formed with a split eye of a size for loosely receiving and sustaining the back saddle on the rearwardly-extending arm of a front saddle, and fulcrum means Within said eye at its bottom part presenting two closely spaced parallel knife edges disposed in the same plane for alternate fulcruming engagement with the usual rearwardly disposed arm extension of a front saddle when the arm is in an inclined position to the back saddle.

3. A back saddle for top rolls of textile spinning machines comprising a body member having a portion constructed to rest in a bearing relationship upon a top roll shaft, and a second portion so arranged as to extend across and rest upon the shaft of an adjacent top roll, an n rightr member intermediate the ends of said body having an opening through which is loosely received the usual rearward arm extension of a front saddle member for sustaining the back sa dle in a suspended relationship from the arm extension and to permit sliding movement of the-- back saddle therealong either into different longitudinally-adjusted positions or to be wholly removed therefrom, and a fulcrum member within r, i and extending upwardly from the bottom surface `35i of said opening in said upright member, said fulcrum member having a flat top surface and oblique front and back surfaces which intersectmgY with said top surface to form a pair of spaced parallel knife edges for alternate engagement 1Q with the undersurface of said arm extension whereby only one of said knife edges at a time will be in fulcruming engagement with the undersurface of said arm extension in one position of the back saddle, the other of said knife edges being brought into fulcruming engagement with the undersurface of the said arm extension by reversal of the back saddle on the arm extension.

GEORGE REPASS. 50 

